Actions
All four quadriceps are powerful extensors of the knee joint. They are crucial in walking, running, jumping and squatting. Because rectus femoris attaches to the ilium, it is also a flexor of the hip. This action is also crucial to walking or running as it swings the leg forward into the ensuing step. The quadriceps, specifically the vastus medialis, plays the important role of stabilizing the patella and the knee joint during gait.
Read more about this topic: Quadriceps Femoris Muscle
Famous quotes containing the word actions:
“Can it be borne, this bodying-forth by wind
Of joy my actions turn on, like a thread
Carrying beads?”
—Philip Larkin (1922–1986)
“I judge a man by his actions with men, much more than by his declarations Godwards—When I find him to be envious, carping, spiteful, hating the successes of others, and complaining that the world has never done enough for him, I am apt to doubt whether his humility before God will atone for his want of manliness.”
—Anthony Trollope (1815–1882)
“When a Man is in a serious Mood, and ponders upon his own Make, with a Retrospect to the Actions of his Life, and the many fatal Miscarriages in it, which he owes to ungoverned Passions, he is then apt to say to himself, That Experience has guarded him against such Errors for the future: But Nature often recurs in Spite of his best Resolutions, and it is to the very End of our Days a Struggle between our Reason and our Temper, which shall have the Empire over us.”
—Richard Steele (1672–1729)